# stra=input("大声道")
# while stra.strip()=="":
#   print("must input")
#   stra=input("stra")
# print("stra")


# for
# strlist = ["a","b","cd","ef"]
# for str in strlist:
#   print(str)


# for str in strlist:
#   print("hello")


# numlist=range(0,10)#前闭后开
# print(numlist)
# for i in numlist:
#   print(i)

# d={1:"a",2:"s",3:"dsd"}
# for k,v in d.items():
#   print(k,v)


# a=[1,2,3]
# b=["a","b","c"]
# for i in range(len(a)):
#   print(a[i],b[i])


# a=[1,2,3]
# b=["a","b","c"]
# print(list(zip(a,b)))

# a=["a","b","c","d","e","f"]
# for i,s in enumerate(a):
#   print(i,s)

# 0 a
# 1 b
# 2 c
# 3 d
# 4 e
# 5 f


# a="Helloab"
# b=reversed(a)
# print(list(b))



# for n in range (10,0,-1):
#   if n==5:
#     continue
#   print(n)

# # 10
# # 9
# # 8
# # 7
# # 6
# # 4
# # 3
# # 2
# # 1


# a=[1,2,3,4,5,6]
# flag=False
# for k in a:
#   if(k==12):
#     print("find 12")
#     flag=True
#     break
# else:#break结束不走else,唯一一个可以else和for连用的语言
#   print("dont find")



# a=[x**2 for x in range(10)]
# print(a)

#生产棋盘坐标
# coor=[]
# for x in range(4):
#   for y in range(4):
#     coor.append((x,y))
# print(coor)

# coor=[(x,y)for x in range(4)for y in range (4)]
# print(coor)


# a=["art","book","damstart","rammstein"]
# b=["gunnnrose","nirvana","skid row"]
# c=[x+"-"+y for x in a for y in b if x[0]==y[0] ]
# print(c)

# a={i:"{} squaraed is {}".format(i,i*i)for i in range(10)}
# print(a)

# a=["art","book","damstart","rammstein"]
# b=["gunnnrose","nirvana","skid row"]
# c=[x+"-"+y for x in a for y in b ]
# print(c)

# stra=input("user:")
# if stra !="":
#   print(stra)
# else:
#   pass#避免不完整的语句

# x=[1,2,3]
# print(x)
# y=x
# del x
# print(y)
# print(x)

# # [1, 2, 3]
# # [1, 2, 3]


# exec("print('Hello python')")#将字符串作为语句执行
# a=eval("32*5+4")
# print(a)

# Hello python
# 164

a=eval(input('expr>'))
print(a)